GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB

A. J. Castro-Tirado, J. Gorosabel, S. Guziy, D. Reverte, J. M. Castro Cerón, A. De Ugarte Postigo, N. Tanvir, S. Mereghetti, A. Tiengo, J. Buckle, R. Sagar, S. B. Pandey, V. Mohan, N. Masetti, F. Mannucci, S. Feltzing, I. Lundstrom, H. Pedersen, C. Riess, S. TrushkinJ. Vílhez, N. Lund, S. Brandt, S. Martínez Núñez, V. Reglero, M. D. Pérez-Ramírez, S. Klose, J. Greiner, J. Hjorth, L. Kaper, E. Pian, E. Palazzi, M. I. Andersen, A. Fruchter, J. P.U. Fynbo, B. L. Jensen, C. Kouveliotou, J. Rhoads, E. Rol, P. M. Vreeswijk, R. A.M.J. Wijers, E. Van den Heuvel

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ∼ 1.7 days after the event. Here we report the discovery of a dim optical afterglow (OA) that would not have been detected by many previous searches due to its faintess (R ∼ 23). This OA was seen to decline following a power law decay with index α R = -0.95 ± 0.16. The spectral index βopt/NIR yielded -1.25 ± 0.14. These values may be explained by a relativistic expansion of a fireball (with p = 2.0) in the cooling regime. We also find evidence for inverse Compton scattering in X-rays.

Original languageEnglish (US)
Pages (from-to)L315-L319
JournalAstronomy and Astrophysics
Volume411
Issue number1
DOIs
StatePublished - Nov 2003
Externally publishedYes

Keywords

  • Cosmology: observations
  • Gamma rays: bursts
  • Techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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